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Sweden-Number/objects/clipping.c

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/*
* DC clipping functions
*
* Copyright 1993 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdarg.h>
#include <stdlib.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "wownt32.h"
#include "wine/winuser16.h"
#include "gdi.h"
#include "gdi_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(clipping);
/***********************************************************************
* CLIPPING_UpdateGCRegion
*
* Update the GC clip region when the ClipRgn or VisRgn have changed.
*/
void CLIPPING_UpdateGCRegion( DC * dc )
{
if (!dc->hGCClipRgn) dc->hGCClipRgn = CreateRectRgn( 0, 0, 0, 0 );
if (!dc->hVisRgn)
{
ERR("hVisRgn is zero. Please report this.\n" );
exit(1);
}
if (dc->flags & DC_DIRTY) ERR( "DC is dirty. Please report this.\n" );
if (!dc->hClipRgn)
CombineRgn( dc->hGCClipRgn, dc->hVisRgn, 0, RGN_COPY );
else
CombineRgn(dc->hGCClipRgn, dc->hClipRgn, dc->hVisRgn, RGN_AND);
if (dc->funcs->pSetDeviceClipping)
dc->funcs->pSetDeviceClipping( dc->physDev, dc->hGCClipRgn );
}
/***********************************************************************
* SelectClipRgn (GDI32.@)
*/
INT WINAPI SelectClipRgn( HDC hdc, HRGN hrgn )
{
return ExtSelectClipRgn( hdc, hrgn, RGN_COPY );
}
/******************************************************************************
* ExtSelectClipRgn [GDI32.@]
*/
INT WINAPI ExtSelectClipRgn( HDC hdc, HRGN hrgn, INT fnMode )
{
INT retval;
RECT rect;
DC * dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
TRACE("%p %p %d\n", hdc, hrgn, fnMode );
if (dc->funcs->pExtSelectClipRgn)
{
retval = dc->funcs->pExtSelectClipRgn( dc->physDev, hrgn, fnMode );
GDI_ReleaseObj( hdc );
return retval;
}
if (!hrgn)
{
if (fnMode == RGN_COPY)
{
if (dc->hClipRgn) DeleteObject( dc->hClipRgn );
dc->hClipRgn = 0;
}
else
{
FIXME("Unimplemented: hrgn NULL in mode: %d\n", fnMode);
GDI_ReleaseObj( hdc );
return ERROR;
}
}
else
{
if (!dc->hClipRgn)
{
RECT rect;
GetRgnBox( dc->hVisRgn, &rect );
dc->hClipRgn = CreateRectRgnIndirect( &rect );
}
if(fnMode == RGN_COPY)
CombineRgn( dc->hClipRgn, hrgn, 0, fnMode );
else
CombineRgn( dc->hClipRgn, dc->hClipRgn, hrgn, fnMode);
}
CLIPPING_UpdateGCRegion( dc );
GDI_ReleaseObj( hdc );
return GetClipBox(hdc, &rect);
}
/***********************************************************************
* SelectVisRgn (GDI.105)
*/
INT16 WINAPI SelectVisRgn16( HDC16 hdc16, HRGN16 hrgn )
{
int retval;
HDC hdc = HDC_32( hdc16 );
DC * dc;
if (!hrgn) return ERROR;
if (!(dc = DC_GetDCPtr( hdc ))) return ERROR;
TRACE("%p %04x\n", hdc, hrgn );
dc->flags &= ~DC_DIRTY;
retval = CombineRgn( dc->hVisRgn, HRGN_32(hrgn), 0, RGN_COPY );
CLIPPING_UpdateGCRegion( dc );
GDI_ReleaseObj( hdc );
return retval;
}
/***********************************************************************
* OffsetClipRgn (GDI32.@)
*/
INT WINAPI OffsetClipRgn( HDC hdc, INT x, INT y )
{
INT ret = SIMPLEREGION;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
TRACE("%p %d,%d\n", hdc, x, y );
if(dc->funcs->pOffsetClipRgn)
ret = dc->funcs->pOffsetClipRgn( dc->physDev, x, y );
else if (dc->hClipRgn) {
ret = OffsetRgn( dc->hClipRgn, MulDiv( x, dc->vportExtX, dc->wndExtX ),
MulDiv( y, dc->vportExtY, dc->wndExtY ) );
CLIPPING_UpdateGCRegion( dc );
}
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* OffsetVisRgn (GDI.102)
*/
INT16 WINAPI OffsetVisRgn16( HDC16 hdc16, INT16 x, INT16 y )
{
INT16 retval;
HDC hdc = HDC_32( hdc16 );
DC * dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
TRACE("%p %d,%d\n", hdc, x, y );
retval = OffsetRgn( dc->hVisRgn, x, y );
CLIPPING_UpdateGCRegion( dc );
GDI_ReleaseObj( hdc );
return retval;
}
/***********************************************************************
* ExcludeClipRect (GDI32.@)
*/
INT WINAPI ExcludeClipRect( HDC hdc, INT left, INT top,
INT right, INT bottom )
{
HRGN newRgn;
INT ret;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
TRACE("%p %dx%d,%dx%d\n", hdc, left, top, right, bottom );
if(dc->funcs->pExcludeClipRect)
ret = dc->funcs->pExcludeClipRect( dc->physDev, left, top, right, bottom );
else
{
POINT pt[2];
pt[0].x = left;
pt[0].y = top;
pt[1].x = right;
pt[1].y = bottom;
LPtoDP( hdc, pt, 2 );
if (!(newRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
else
{
if (!dc->hClipRgn)
{
dc->hClipRgn = CreateRectRgn( 0, 0, 0, 0 );
CombineRgn( dc->hClipRgn, dc->hVisRgn, 0, RGN_COPY );
}
ret = CombineRgn( dc->hClipRgn, dc->hClipRgn, newRgn, RGN_DIFF );
DeleteObject( newRgn );
}
if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
}
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* IntersectClipRect (GDI32.@)
*/
INT WINAPI IntersectClipRect( HDC hdc, INT left, INT top, INT right, INT bottom )
{
INT ret;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
TRACE("%p %d,%d - %d,%d\n", hdc, left, top, right, bottom );
if(dc->funcs->pIntersectClipRect)
ret = dc->funcs->pIntersectClipRect( dc->physDev, left, top, right, bottom );
else
{
POINT pt[2];
pt[0].x = left;
pt[0].y = top;
pt[1].x = right;
pt[1].y = bottom;
LPtoDP( hdc, pt, 2 );
if (!dc->hClipRgn)
{
dc->hClipRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y );
ret = SIMPLEREGION;
}
else
{
HRGN newRgn;
if (!(newRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
else
{
ret = CombineRgn( dc->hClipRgn, dc->hClipRgn, newRgn, RGN_AND );
DeleteObject( newRgn );
}
}
if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
}
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* ExcludeVisRect (GDI.73)
*/
INT16 WINAPI ExcludeVisRect16( HDC16 hdc16, INT16 left, INT16 top, INT16 right, INT16 bottom )
{
HRGN tempRgn;
INT16 ret;
POINT pt[2];
HDC hdc = HDC_32( hdc16 );
DC * dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
pt[0].x = left;
pt[0].y = top;
pt[1].x = right;
pt[1].y = bottom;
LPtoDP( hdc, pt, 2 );
TRACE("%p %ld,%ld - %ld,%ld\n", hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y);
if (!(tempRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
else
{
ret = CombineRgn( dc->hVisRgn, dc->hVisRgn, tempRgn, RGN_DIFF );
DeleteObject( tempRgn );
}
if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* IntersectVisRect (GDI.98)
*/
INT16 WINAPI IntersectVisRect16( HDC16 hdc16, INT16 left, INT16 top, INT16 right, INT16 bottom )
{
HRGN tempRgn;
INT16 ret;
POINT pt[2];
HDC hdc = HDC_32( hdc16 );
DC * dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
pt[0].x = left;
pt[0].y = top;
pt[1].x = right;
pt[1].y = bottom;
LPtoDP( hdc, pt, 2 );
TRACE("%p %ld,%ld - %ld,%ld\n", hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y);
if (!(tempRgn = CreateRectRgn( pt[0].x, pt[0].y, pt[1].x, pt[1].y ))) ret = ERROR;
else
{
ret = CombineRgn( dc->hVisRgn, dc->hVisRgn, tempRgn, RGN_AND );
DeleteObject( tempRgn );
}
if (ret != ERROR) CLIPPING_UpdateGCRegion( dc );
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* PtVisible (GDI32.@)
*/
BOOL WINAPI PtVisible( HDC hdc, INT x, INT y )
{
BOOL ret = FALSE;
DC *dc = DC_GetDCUpdate( hdc );
TRACE("%p %d,%d\n", hdc, x, y );
if (!dc) return FALSE;
if (dc->hGCClipRgn)
{
POINT pt;
pt.x = x;
pt.y = y;
LPtoDP( hdc, &pt, 1 );
ret = PtInRegion( dc->hGCClipRgn, pt.x, pt.y );
}
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* RectVisible (GDI32.@)
*/
BOOL WINAPI RectVisible( HDC hdc, const RECT* rect )
{
BOOL ret = FALSE;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return FALSE;
TRACE("%p %ld,%ldx%ld,%ld\n", hdc, rect->left, rect->top, rect->right, rect->bottom );
if (dc->hGCClipRgn)
{
POINT pt[2];
RECT tmpRect;
pt[0].x = rect->left;
pt[0].y = rect->top;
pt[1].x = rect->right;
pt[1].y = rect->bottom;
LPtoDP( hdc, pt, 2 );
tmpRect.left = pt[0].x;
tmpRect.top = pt[0].y;
tmpRect.right = pt[1].x;
tmpRect.bottom = pt[1].y;
ret = RectInRegion( dc->hGCClipRgn, &tmpRect );
}
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* GetClipBox (GDI32.@)
*/
INT WINAPI GetClipBox( HDC hdc, LPRECT rect )
{
INT ret;
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return ERROR;
ret = GetRgnBox( dc->hGCClipRgn, rect );
DPtoLP( hdc, (LPPOINT)rect, 2 );
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* GetClipRgn (GDI32.@)
*/
INT WINAPI GetClipRgn( HDC hdc, HRGN hRgn )
{
INT ret = -1;
DC * dc;
if (hRgn && (dc = DC_GetDCPtr( hdc )))
{
if( dc->hClipRgn )
{
if( CombineRgn(hRgn, dc->hClipRgn, 0, RGN_COPY) != ERROR ) ret = 1;
}
else ret = 0;
GDI_ReleaseObj( hdc );
}
return ret;
}
/***********************************************************************
* SaveVisRgn (GDI.129)
*/
HRGN16 WINAPI SaveVisRgn16( HDC16 hdc16 )
{
HRGN copy;
GDIOBJHDR *obj, *copyObj;
HDC hdc = HDC_32( hdc16 );
DC *dc = DC_GetDCUpdate( hdc );
if (!dc) return 0;
TRACE("%p\n", hdc );
if (!(obj = GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC )))
{
GDI_ReleaseObj( hdc );
return 0;
}
if (!(copy = CreateRectRgn( 0, 0, 0, 0 )))
{
GDI_ReleaseObj( dc->hVisRgn );
GDI_ReleaseObj( hdc );
return 0;
}
CombineRgn( copy, dc->hVisRgn, 0, RGN_COPY );
if (!(copyObj = GDI_GetObjPtr( copy, REGION_MAGIC )))
{
DeleteObject( copy );
GDI_ReleaseObj( dc->hVisRgn );
GDI_ReleaseObj( hdc );
return 0;
}
copyObj->hNext = obj->hNext;
obj->hNext = HRGN_16(copy);
GDI_ReleaseObj( copy );
GDI_ReleaseObj( dc->hVisRgn );
GDI_ReleaseObj( hdc );
return HRGN_16(copy);
}
/***********************************************************************
* RestoreVisRgn (GDI.130)
*/
INT16 WINAPI RestoreVisRgn16( HDC16 hdc16 )
{
HRGN saved;
GDIOBJHDR *obj, *savedObj;
HDC hdc = HDC_32( hdc16 );
DC *dc = DC_GetDCPtr( hdc );
INT16 ret = ERROR;
if (!dc) return ERROR;
TRACE("%p\n", hdc );
if (!(obj = GDI_GetObjPtr( dc->hVisRgn, REGION_MAGIC ))) goto done;
saved = HRGN_32(obj->hNext);
if ((savedObj = GDI_GetObjPtr( saved, REGION_MAGIC )))
{
ret = CombineRgn( dc->hVisRgn, saved, 0, RGN_COPY );
obj->hNext = savedObj->hNext;
GDI_ReleaseObj( saved );
DeleteObject( saved );
dc->flags &= ~DC_DIRTY;
CLIPPING_UpdateGCRegion( dc );
}
GDI_ReleaseObj( dc->hVisRgn );
done:
GDI_ReleaseObj( hdc );
return ret;
}
/***********************************************************************
* GetRandomRgn [GDI32.@]
*
* NOTES
* This function is documented in MSDN online for the case of
* dwCode == SYSRGN (4).
*
* For dwCode == 1 it should return the clip region
* 2 " " " the meta region
* 3 " " " the intersection of the clip with
* the meta region (== 'Rao' region).
*
* See http://www.codeproject.com/gdi/cliprgnguide.asp
*/
INT WINAPI GetRandomRgn(HDC hDC, HRGN hRgn, DWORD dwCode)
{
switch (dwCode)
{
case SYSRGN: /* == 4 */
{
DC *dc = DC_GetDCPtr (hDC);
if (!dc) return -1;
CombineRgn (hRgn, dc->hVisRgn, 0, RGN_COPY);
GDI_ReleaseObj( hDC );
/*
* On Windows NT/2000,
* the region returned is in screen coordinates.
* On Windows 95/98,
* the region returned is in window coordinates
*/
if (!(GetVersion() & 0x80000000))
{
POINT org;
GetDCOrgEx(hDC, &org);
OffsetRgn(hRgn, org.x, org.y);
}
return 1;
}
case 1: /* clip region */
return GetClipRgn (hDC, hRgn);
default:
WARN("Unknown dwCode %ld\n", dwCode);
return -1;
}
return -1;
}
/***********************************************************************
* GetMetaRgn (GDI32.@)
*/
INT WINAPI GetMetaRgn( HDC hdc, HRGN hRgn )
{
FIXME( "stub\n" );
return 0;
}
/***********************************************************************
* SetMetaRgn (GDI32.@)
*/
INT WINAPI SetMetaRgn( HDC hdc )
{
FIXME( "stub\n" );
return ERROR;
}
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